Tubular-rivet-setting machine.



Patented Sept. l6, I902.

T. S. BENNETT.

TUBULAR RIVET SETTING MACHINE.

(Application filed Feb. 24, 1902) (No Model.)

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NIT-ED STATES v -THOMAS S. BENNETT, OF ATTLEBORO, MASSACHUSETTS, ASSIGNOR TO THE D. F. BRIGGS COMPANY, OF ATTLEBORO, MASSACHUSETTS.

TUBU LAR-RIVET-SETTING MACHINE.

SPECIFIGATION forming part of Letters Patent No. 709,196, dated September 16, 1902.

' Application filed February 24, 1902. Serial No. 95,206. (No model.)

To all whom it may concern:

Be it known that I, THOMAS S. BENNETT, a citizen of the United States, residing at Attleboro, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Tubular-'Rivet-Setting Machines, of which the following is a specification. a

' My invention has reference to rivet-setting machines, and more particularly to machines for setting tubular or semitubular rivets; and it consists in the peculiar and novel construction of the head carrying the riveting-tool, whereby the riveting-toolis set at an angle in relation to the axis of the head and rotates as a whole with the head, but is prevented from rotating on its own axis, thus giving a rocking instead of a spinning motion to the face of the riveting-tool.

The object of this invention is to so construct a rivetingmechanism for setting tubular or semitubular rivets that the face of the riveting-tool will be at an angle withthe tubular end of the rivet, so that when pressure is brought to bear on the rivet that part of the face of the riveting-tool nearest the end of the tubular rivetacts first on the rivet and forces or rolls the tubular end of the rivet at that point over and upon the'article to be riveted as the head carrying the riveting-tool rotates. This action continues until the entire end of the rivet has been acted upon by the riveting-tool; thus'riveting or setting the rivet on the article.

My invention further consists in the novel use and arrangement-of gearing connecting the tool-holder with a fixed gear,whereby the tool and holder rotate with the head, but is prevented by the gearing from rotating on its own axis, as will be more fully set forth hereinafter. i t

' Fignrel isa front view ofmyimproved rivetsetting mechanism as attached to a simple of the tool and its holder in relation to the r0- tating head. Fig. 3 is a cross-sectional view taken on line X X of Fig. 2, showing the fixed gear and head-shaft in section, the skew-gear on the shaft of the tool-holder, andthe intermediate gear connecting the skew-gear with the fixed gear pivotall y supported on the head. Fig. 4 is a side view of the end of the riveting-tool, showing the article in position to be riveted. Fig. 5 is a view of the same, showing the article after it has been riveted with the tool shown in its opposite position in broken lines. Fig. 6 is a face view of the article after it has been riveted with the tubular rivet,

- In the drawings, (1 indicates the base, I) the head-stock, and c the tail-stock,of a rivetingmachine. The tail-stock c is adjustably supported on the base and carries the springpressed plunger 0', having the end 0 The operating-lever c is pivoted to the tail-stock c at its lower end and has the stop 0 to hold it in position to operate on the plunger 0. The head-stock b has the hearing I) for the shaft d, which has the fast pulley d and the loose pulley d on its outer end and the head d of the riveting mechanism on its inner end. This head 01 has the bearing d for the shaft of the tool-holder set at an angle to the axis of the shaft d, as shown in Fig. 2. The shaft 6 of the tool-holder e is snpportedin the bearing (1 and has the shoulder 6. This shoulder is shaped on its inner face to rotate on a circle of balls e which in turn rotate in the cup shaped depression or raceway c in the end of the bearing (1, forming a ball-bearing to take the thrust of the riveting-tool f. The tool-holder c has the tapered hole (2 for frictionally securing the tapered end f of the tool f to the tool-holder. The riveting end of the tool f has the cone-shaped point f to slightly expand the tubular endof the rivet and the flange or face f to roll or force the end of the rivet over and upon the article to be riveted, as shown in Figs. t and 5. On the end of the tool-holder shaft 6 I secure the skew-gear g through akey having a sliding fit in a groove on the shaft eby a washer and screw screwed into the end of the shaft-e and abutting on the face of the skew-gear g, with space between the washer and the end of the shaft 6 to allow for any adjustment required in the ball-bearing, as shownin Fig. 2. The skew-gear g meshes with the intermediate IOC gear g, pivotally supported on the head 01 by the stud 9 This in turnmeshes with the fixed gear g surrounding the shaft d and formed integral with and secured to'the headstock I).

The operation of the several parts is as follows: The shaft (1 rotates in the bearing 1) by the fast pulley don its'outer end and has the head (1 formed integral with or secured to it on its inner end. This head has the bearing (1 for the tool-holder shaft 6 set at an angle in relation to the axis of the headshaft 01 so as always to present the face of the riveting-tool at an angle to the end of the rivet. As the head d rot-ates it carries with it the tool-holder and riveting-tool f, the skewgear g, and the intermediate gear 9, meshing with the fixed gear 9 on the head-stock I). These gears, as shown, are of thesame size and pitch. By this construction. the riveting-tool is supported by and rotates with the head d3, but is held from rotating on its own axis by the gears g, g, and g By this arrangement of the gears the bearing 61 rotates around the tool-holder shaft e. The article to be riveted may be of any form, as shown in Figs. 4, 5, and 6. It consists of a cup-shaped piece and aflat disk. It is held in position on the face of the plunger end 0 The lever is then operated to move the plunger 0 forward, forcing the tubular end ,-of the rivet against the face f of the riveting-tool-. As thehead d rotates it gives to this face of the rivet-tool a continuous rocking motion, forcing or rolling the tubular end of the rivet over and upon the article to be riveted.

I do not wish to confine myself to the construction of the riveting-machine shown in the drawings, as my improved riveting mechanism canbe used in any form of a machine that will advance the rivet, or the riveting mechanism may be advanced against the rivet, also the riveting-tool may be secured in the holder by any suitable means, and, if desired, the ratio of the gears may be changed to give a faster or a slower motion to the riveting-tool, without departing from the sense of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a rivet-setting mechanism, a shaft rotatably mounted in bearings, a head formed integral with or secured to the shaft, means for rotating" the shaft, a bearing set at an angle and formed integral with the head, a

tool-holder in the bearing, and means for ro-- tating the bearing around the tool-holder and retarding or holding the tool-holder from rotating on its own axis.

2. In a rivet-setting mechanism, a shaft rotatably secured in bearings, a head secured to the shaft, means for rotating the shaft, a bearing set at an angle in the head and offset from the center of the shaft, 2. tool-holder shaft in the bearing, a tool-holder on the shaft, a riveting-tool secured in the toolholder, and gearing connecting the tool-holder shaft with a fixed gear to retard or hold the tool-holder shaft from rotating.

3. In a rivet-setting mechanism, a head rotatably secured in bearings, a riveting-tool set at an angle in and offset from the center of the head, means for rotating the head, and gearing connecting the riveting-tool with a fixed gear to retard or hold the riveting-tool from rotating.

4. In a rivet-setting mechanism, a head formed integral with or secured to a shaft rotatably mounted in bearings, a riveting-tool set at an angle in the head and having a face set at right angle tothe axis of the tool, and means for rotating the head to give to the face of the riveting-tool a continuous rocking motion, as described.

5. In a rivet-setting mechanism, ashaft rotatably mounted in a bearing, a head secured to the shaft, a gear fixed to the bearing intermediate the head and the bearing and surrounding the shaft, a bearing in the head offset from the center of the shaft and set at an angleto the shaft, a tool-holder in the bearing, a riveting-tool secured in the holder having a face at right angle to its axis and a coneshaped point projecting from its face, a skewgear secured to the end of the tool-holder, an intermediate gear pivotally secured to the head connecting the skew-gear with the fixed gear for retarding or holding the rivetingtool from rotating, means for forcing the face of theriveting-tool against the tubular end of the rivet, and means for rotating the riveting mechanism to give to the face of the riveting-tool a continuous rocking motion to force or roll the tubular end of the rivet over and upon the article to be riveted, as described. v

6. In a tubular or semitubular riveting machine, the base a, the head-stock 11 secured to the base, the tail-stock b adjustably secured to the base, the spring-pressed plunger 0 with the end 0 in the tail-stock and on a line with the riveting-tool, the lever c pivotally held in position to operate on the plunger 0 by the stop 0 to force the rivet against the face of the riveting-tool, the shaft d having its bearing 1) in the head-stock b and carrying the fast pulley d and the loose pulley d on its outer end, and the head 01 on its inner end, the bearing d set at an angle in the head, the tool-holder shaft 6 in the bearing 01 the tool-holder e secured to the shaft 6 and having the shoulder e shaped on its inner face to run on a circle of balls e the cupshaped depression or raceway e in the end of the bearing 01 forming a ball-bearing to take the thrust of the riveting-tool, the tapered hole e for frictionally securing the tapered end f of the riveting-tool f to the toolholder, the cone-shaped point f to slightly expand the tubular end of the rivet, and the flange or face f to roll or force the end of the rivet over and upon the article to be riveted,-the skew-gear g on the shaft 6, the intermediate gear g pivotally secured to the i 5 head d by the stud g and the fixed gear g In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS S. BENNETT.

Witnesses:

secured to the bearing b and surrounding B. S. WEBSTER, the shaft (1, as and for the purpose described. J. A. MILLER, Jr. 

